Stripe: “No such price: 'price_...'”

What it means

The price ID is from test mode while using a live key (or vice versa), or was deleted.

How to fix it

Match test/live keys with price IDs from the same Stripe mode.

Paste this into Stripe

Stop retrying previous fixes. I'm getting this error: "No such price: 'price_...'". Likely cause: The price ID is from test mode while using a live key (or vice versa), or was deleted. Before editing, show me the relevant files and confirm the root cause. Then: Match test/live keys with price IDs from the same Stripe mode. Change only what's necessary, don't delete working code, don't add new libraries unless required, and tell me exactly what you changed and how to verify it.